Short answer: Good building airtightness is achieved in 3 steps: Plan – Build – Check. The building airtightness requirement is defined in the design phase of the building. The air barrier is then drawn in design and execution plans, and … Continue reading →
Short answer: In most European countries the building preparation is based on ISO 9972 requirements. However, the interpretation of these requirements may differ from one country to another, and based on different building preparation rules. Long answer: Building preparation errors … Continue reading →
TightVent Europe has published a list of applicable standards for building and ductwork airtightness. The detailed list can be found here.
Continue reading →Short answer: Airtightness durability is a growing issue in Europe and the US. In the long-term, it seems that some specific sealing products have durable performances but on-site studies have shown that many factors can deteriorate the airtightness durability of … Continue reading →
Short answer: TAAC is the TightVent Airtightness Associations Committee and has the primary goal to bring together national associations and experts on building and ductwork airtightness in order to promote reliable testing and reporting procedures. Long answer: TAAC is the … Continue reading →
France, Belgium (Flemish Region) & the United Kingdom have national databases that gather most of measurements performed by qualified testers in their countries. Other initiatives also exist in Spain, Germany, Czech Republic, Estonia and the US [1], [2]. More information can … Continue reading →
See Definitions of terms used for tightening products at the end of the list of FAQs.
Continue reading →Building airtightness (also called envelope airtightness) can be defined as the resistance to inward or outward air leakage through unintentional leakage points or areas in the building envelope. This air leakage is driven by differential pressures across the building envelope … Continue reading →
Infiltration/exfiltration is the uncontrolled inward/outward leakage of outdoor/indoor air through air permeable materials, joints, cracks, interstices and other unintentional openings of a building envelope, caused by the pressure effects of wind, the stack effect or operation of HVAC-systems [1]. Infiltration/exfiltration causes convective … Continue reading →
The implementation of the EPBD recast puts increasing pressure to achieve better building and ductwork airtightness since for most European climates and countries, good airtightness levels are necessary to achieve nearly zero-energy buildings. This has been shown in a number … Continue reading →
